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Seiko 4N21-0110
The Seiko 4N21-0110 watch movement features a sweep seconds function.
The Seiko 4N21-0110 features the following functions:
- Sweep Seconds
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.70 x 0.110 x 260 x 8.0 mm | GR4904 | Manual | Buy mainspring |
| 1.60 x 0.095 x 360 x 9.5 mm | GR4479 | Manual | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| HAIRSPRING STUD COVER | M/250 | 3257/ROL 600 | Buy part |
| JEWEL, LOWER BALANCE CAP | 330/173 (use 6944/ROL 1030) | 330/173 | Buy part |
| JEWEL, UPPER BALANCE | 336/39 | 3078/ROL | Buy part |
| JEWEL, UPPER BALANCE CAP | 311/174 | 311/174 | Buy part |
| MAINSPRING 1.70-.11-330 | MS-810N | GR 4904 | Buy part |
| PALLER ARBOR | 72S/63P | 714/FE 233.60 | Buy part |
| REGULATOR COVER | M/249 | 2851/ROL 500 | Buy part |
| ROLLER,INC W/CREASE 215X95X37 | 82S/176R | 82S/176R | Buy part |
| SCREW, INT CROWN WHEEL | 5420/512 | 5420/512 | Buy part |
| SCREW, SET LEVER | 5443/974 | Buy part | |
| SET LEVER | 443/1209 | Buy part | |
| STAFF | 100/416 | 100/416 | Buy part |
| STAFF, GENUINE PIV 8 | 723/480 | 723/480 | Buy part |
| STEM | 200/422F | 401/254 | Buy part |
| STEM, GENUINE | 401/254 | Buy part |
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